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Colloid-facilitated transport of metolachlor through intact soil columns
Journal of Environmental Science and Health, Part B, 1996This study evaluated the role of water dispersible colloids with diverse physicochemical and mineralogical characteristics in facilitating the transport of metolachlor through macropores of intact soil columns. The soil columns represented upper solum horizons of an Alfisol in the Bluegrass region of Kentucky. Three different colloid suspensions tagged
A. K. Seta, A. D. Karathanasis
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Numerical simulation of colloid-facilitated impurity transport in porous media
The European Physical Journal B, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kondratenko, Peter S. +2 more
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Dimensional Analysis of Colloid-Facilitated Ground-Water Contaminant Transport
Journal of Hydrologic Engineering, 1996Mobile subsurface colloids can carry ground-water contaminants sorbed onto their surfaces to far greater distances than predicted using a conventional advective/dispersive transport equation with normal retardation values. In this study, we present a dimensional analysis of colloid-facilitated ground-water contaminant transport. The significance of the
M. Yavuz Corapcioglu, Shiyan Jiang
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Estuarine Colloids: Sorption Capacity, Colloid Facilitated Transport and Bioavailibility
1994Abstract : LONG-TERM GOALS. To gain a better understanding of the role of colloidal organic macromolecules and inorganic colloidal microparticles in the cycling, speciation and bioavailability of trace elements in coastal waters. SCIENTIFIC OBJECTIVES. 1. Critically evaluate ultra-filtration methodology for the collection of colloidal matter from fresh,
Gary A. Gill, Peter Santschi
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Atrazine Adsorption and Colloid‐Facilitated Transport through the Unsaturated Zone
Journal of Environmental Quality, 2000AbstractOne explanation for unexpectedly widespread ground water contamination from atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐s‐triazine) may be the occurrence of colloid‐facilitated transport, whereby the dissolved herbicide becomes adsorbed to mobile colloids that migrate through preferential flow‐paths in the soil zone and into the ground ...
Lori A. Sprague +3 more
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Colloid-Facilitated Cs Transport through Water-Saturated Hanford Sediment and Ottawa Sand
Environmental Science & Technology, 2003In this study, a series of saturated column experiments were conducted to investigate effects of colloids on Cs transport in two types of porous media (Hanford sediment characteristic of 2:1 clay minerals and silica Ottawa sand). The colloids used were obtained by reacting Hanford sediment with simulated tank waste solutions.
Jie, Zhuang, Markus, Flury, Yan, Jin
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Modeling colloid-facilitated transport of multi-species contaminants in unsaturated porous media
Journal of Contaminant Hydrology, 2007Colloid-facilitated transport has been recognized as a potentially important and overlooked contaminant transport process. In particular, it has been observed that conventional two phase sorption models are often unable to explain transport of highly sorbing compounds in the subsurface appropriately in the presence of colloids.
Arash, Massoudieh, Timothy R, Ginn
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Decreased Salinity and Actinide Mobility: Colloid-Facilitated Transport or pH Change?
Environmental Science & Technology, 2016Colloids have been implicated in influencing the transport of actinides and other adsorbed contaminants in the subsurface, significantly increasing their mobility. Such colloid-facilitated transport can be induced by changes in groundwater chemistry that occur, for example, when high ionic strength contaminant plumes are displaced by infiltrating ...
Brian, Haliena +4 more
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Chemical Factors Influencing Colloid-Facilitated Transport of Contaminants in Porous Media
Environmental Science & Technology, 1997The effects of colloids on the transport of two strongly sorbing solutesa hydrophobic organic compound, phenanthrene, and a metal ion, Ni2+were studied in sand-packed laboratory columns under different pH and ionic strength conditions. Two types of column experiments were performed as follows: (i) sorption/mobilization experiments where the ...
Sujoy B. Roy, David A. Dzombak
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Colloid-facilitated tracer transport by steady random ground-water flow
Physics of Fluids, 2000We study the transport of reactive solute in a three-phase system (water–solid matrix-colloids) in natural porous media. Semianalytical (integral) solutions are derived for the first time, which can be used for computing expected concentration, mass flux, or discharge for the dissolved as well as for colloid-bounded tracer.
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